function say () {
  console.log(1);
  let a = 1

  console.log(a);
  a++
}

function dd () {
  log()

  return () => {
    let b = 122

    let log = '测试中文'

    b++

    let j = log

    console.log(b);

    console.debug(2)

    console.info(3)
    console.warn(4)
  }
}

function log() {
  console.log('测试log函数');
}

console.log('结束');